<template>
  <div class="icons">
    <swiper :options="swiperOption">
      <swiper-slide v-for="(page, index) in pages" :key="index">
        <div class="icon" v-for="item in page" :key="item.key">
          <div class="icon-img">
            <img :src="item.imgUrl">
          </div>
          <p v-text="item.desc"></p>
        </div>
      </swiper-slide>
    </swiper>
  </div>
</template>

<script>
  export default {
    name: 'Icons',
    props: {
      iconList: Array
    },
    data(){
      return {
        swiperOption: {
          autoplay: false
        }
      }
    },

    computed:{
      pages(){
        const pages = [];
        this.iconList.forEach((item, index) => {
          const page = Math.floor(index / 8);
          if(!pages[page]){
            pages[page] = [];
          }
          pages[page].push(item)
        })
        return pages
      }
    }
  }
</script>

<style scoped>
  .icons {
    height: 0;
    overflow: hidden;
    padding-bottom: 50%;
    margin-top: .1rem;
  }

  .icon {
    float: left;
    width: 25%;
    padding-bottom: 25%;
    position: relative;
    overflow: hidden;
    height: 0
  }

  .icon-img {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: .44rem;
    box-sizing: border-box;
    padding: .1rem;
  }

  .icon-img img {
    height: 100%;
    display: block;
    margin: 0 auto;
  }

  .icon p {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: .44rem;
    line-height: .44rem;
    color: #333;
    text-align: center;
  }
</style>
